1212131153 has 2 divisors, whose sum is σ = 1212131154. Its totient is φ = 1212131152.

The previous prime is 1212131149. The next prime is 1212131177. The reversal of 1212131153 is 3511312121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1209857089 + 2274064 = 34783^2 + 1508^2 .

It is an emirp because it is prime and its reverse (3511312121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212131153 - 2² = 1212131149 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212131653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606065576 + 606065577.

It is an arithmetic number, because the mean of its divisors is an integer number (606065577).

Almost surely, 2^1212131153 is an apocalyptic number.

It is an amenable number.

1212131153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212131153 is an equidigital number, since it uses as much as digits as its factorization.

1212131153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 1212131153 is about 34815.6739558493. The cubic root of 1212131153 is about 1066.2274790360.

Adding to 1212131153 its reverse (3511312121), we get a palindrome (4723443274).

The spelling of 1212131153 in words is "one billion, two hundred twelve million, one hundred thirty-one thousand, one hundred fifty-three".